DE2961279D1 - Thin film magnetic heads - Google Patents

Thin film magnetic heads

Info

Publication number
DE2961279D1
DE2961279D1 DE7979105055T DE2961279T DE2961279D1 DE 2961279 D1 DE2961279 D1 DE 2961279D1 DE 7979105055 T DE7979105055 T DE 7979105055T DE 2961279 T DE2961279 T DE 2961279T DE 2961279 D1 DE2961279 D1 DE 2961279D1
Authority
DE
Germany
Prior art keywords
thin film
film magnetic
magnetic heads
heads
thin
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
DE7979105055T
Other languages
German (de)
Inventor
Mark Anthony Church
Jones, Jr
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
International Business Machines Corp
Original Assignee
International Business Machines Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by International Business Machines Corp filed Critical International Business Machines Corp
Application granted granted Critical
Publication of DE2961279D1 publication Critical patent/DE2961279D1/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/127—Structure or manufacture of heads, e.g. inductive
    • G11B5/31—Structure or manufacture of heads, e.g. inductive using thin films
    • G11B5/3109—Details
    • G11B5/313—Disposition of layers
    • G11B5/3133—Disposition of layers including layers not usually being a part of the electromagnetic transducer structure and providing additional features, e.g. for improving heat radiation, reduction of power dissipation, adaptations for measurement or indication of gap depth or other properties of the structure
    • G11B5/3136—Disposition of layers including layers not usually being a part of the electromagnetic transducer structure and providing additional features, e.g. for improving heat radiation, reduction of power dissipation, adaptations for measurement or indication of gap depth or other properties of the structure for reducing the pole-tip-protrusion at the head transducing surface, e.g. caused by thermal expansion of dissimilar materials
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/127—Structure or manufacture of heads, e.g. inductive
    • G11B5/31—Structure or manufacture of heads, e.g. inductive using thin films
    • G11B5/3109—Details
    • G11B5/313—Disposition of layers

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Magnetic Heads (AREA)
DE7979105055T 1978-12-21 1979-12-10 Thin film magnetic heads Expired DE2961279D1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/972,103 US4219854A (en) 1978-12-21 1978-12-21 Thin film magnetic head assembly

Publications (1)

Publication Number Publication Date
DE2961279D1 true DE2961279D1 (en) 1982-01-14

Family

ID=25519164

Family Applications (1)

Application Number Title Priority Date Filing Date
DE7979105055T Expired DE2961279D1 (en) 1978-12-21 1979-12-10 Thin film magnetic heads

Country Status (9)

Country Link
US (1) US4219854A (en)
EP (1) EP0012910B1 (en)
JP (1) JPS5584020A (en)
AU (1) AU524436B2 (en)
BR (1) BR7908415A (en)
CA (1) CA1126402A (en)
DE (1) DE2961279D1 (en)
ES (1) ES486015A1 (en)
ZA (1) ZA796369B (en)

Families Citing this family (51)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4353102A (en) * 1979-07-04 1982-10-05 Matsushita Electric Industrial Co., Ltd. Thin-film magnetic head
JPS5611613A (en) * 1979-07-04 1981-02-05 Matsushita Electric Ind Co Ltd Thin film magnetic head
JPS5674811A (en) * 1979-11-20 1981-06-20 Matsushita Electric Ind Co Ltd Magnetic head
US4375657A (en) * 1980-11-03 1983-03-01 Brock George W Magnetic head assembly
US4420505A (en) * 1981-02-04 1983-12-13 Eastman Kodak Company Method of making a thin film magnetic head having good low frequency response
US4399479A (en) * 1981-02-04 1983-08-16 Eastman Kodak Company Thin film magnetic head having good low frequency response
JPS5819717A (en) * 1981-07-30 1983-02-04 Fujitsu Ltd Vertical magnetizing recording/reproducing head
US4404609A (en) * 1981-10-30 1983-09-13 International Business Machines Corporation Thin film inductive transducer for perpendicular recording
US4458280A (en) * 1982-01-18 1984-07-03 International Business Machines Corporation Servo writing transducer design and writing method
US4494125A (en) * 1982-05-26 1985-01-15 Ferix Corporation Differential-permeability field-concentrating magnetic read/write head
JPS5971115A (en) * 1982-10-15 1984-04-21 Hitachi Ltd Thin film head for vertical magnetic recording and reproduction
US4593334A (en) * 1983-05-02 1986-06-03 International Business Machines Corporation Thin film transducer
JPS59231722A (en) * 1983-06-13 1984-12-26 Matsushita Electric Ind Co Ltd Thin film magnetic head and its production
DE3346885A1 (en) * 1983-12-23 1985-07-11 Siemens AG, 1000 Berlin und 8000 München THICK LAYER MAGNETIC HEAD FOR A RECORDING MEDIUM TO BE MAGNETIZED
DE3346777A1 (en) * 1983-12-23 1985-07-04 Siemens AG, 1000 Berlin und 8000 München THICK LAYER MAGNETIC HEAD FOR VERTICAL (VERTICAL) RECORDING
DE3566848D1 (en) * 1984-05-04 1989-01-19 Siemens Ag Thin-layer double-gap magnetic head for a perpendicularly magnetized recording medium
DE3418822A1 (en) * 1984-05-21 1985-11-21 Siemens AG, 1000 Berlin und 8000 München Write/read magnetic head of a layered construction for a recording medium to be magnetised perpendicularly
DE3419650A1 (en) * 1984-05-25 1985-11-28 Siemens AG, 1000 Berlin und 8000 München THICK LAYER MAGNETIC HEAD FOR WRITING AND READING FOR A RECORDING MEDIUM TO BE MAGNETIZED
DE3420746A1 (en) * 1984-06-04 1985-12-05 Siemens AG, 1000 Berlin und 8000 München MAGNETIC HEAD CONSTRUCTED IN LAYERS FOR A RECORDING MEDIUM TO BE MAGNETIZED
US4644432A (en) * 1985-01-28 1987-02-17 International Business Machines Three pole single element magnetic read/write head
US4764834A (en) * 1985-03-22 1988-08-16 Applied Magnetics Corporation Thin film magnetic transducer having a separate magnetically conductive layer
DE3513431A1 (en) * 1985-04-15 1986-10-23 Siemens AG, 1000 Berlin und 8000 München METHOD FOR PRODUCING AT LEAST ONE MAGNETIC HEAD IN THIN FILM TECHNOLOGY
US4740855A (en) * 1985-10-18 1988-04-26 Siemens Aktiengesellschaft Magnetic thin-film head having a main and an auxiliary pole for vertical magnetization
JP2514624B2 (en) * 1985-11-29 1996-07-10 日本電信電話株式会社 Thin film magnetic head
DE3544883A1 (en) * 1985-12-18 1987-06-19 Siemens Ag Thin-film magnetic head for the perpendicular magnetisation of a corresponding recording medium
DE3544823A1 (en) * 1985-12-18 1987-06-19 Siemens Ag Thin-film magnetic head for a recording medium to be magnetised longitudinally or perpendicularly
DE3544851A1 (en) * 1985-12-18 1987-06-19 Siemens Ag Thin-film magnetic head for the longitudinal or perpendicular magnetisation of a corresponding recording medium
EP0232505A1 (en) * 1985-12-20 1987-08-19 Siemens Aktiengesellschaft Magnetic storage device with a recording medium to be magnetized perpendicularly
JPS62173607A (en) * 1986-01-27 1987-07-30 Hitachi Ltd Thin film magnetic head
JPS6320079A (en) * 1986-07-11 1988-01-27 ヤンマー農機株式会社 Sensor device for granular body such as cereal grain
US4875124A (en) * 1988-01-11 1989-10-17 International Business Machines Corporation Thin film magnetic heads with thermally crosslinked insulation
DE3831803C2 (en) * 1988-09-19 1995-02-09 Siemens Ag Thin film magnetic head with a flat read / write coil winding
US5032944A (en) * 1989-01-12 1991-07-16 Mitsubishi Denki Kabushiki Kaisha Membrane type magnetic head
US5236735A (en) * 1989-05-27 1993-08-17 Tdk Corporation Method of producing a thin film magnetic head
NL9001147A (en) * 1990-05-17 1991-12-16 Philips Nv THIN MOVIE MAGNETIC HEAD.
US5220471A (en) * 1990-08-14 1993-06-15 Tdk Corporation Air bearing slider having a longitudinal groove in surface remote from recording medium
US5059278A (en) * 1990-09-28 1991-10-22 Seagate Technology Selective chemical removal of coil seed-layer in thin film head magnetic transducer
US5472736A (en) * 1991-06-03 1995-12-05 Read-Rite Corporation Method of making a bi-level coil for a thin film magnetic transducer
US5173826A (en) * 1991-06-03 1992-12-22 Read-Rite Corp. Thin film head with coils of varying thickness
US5748414A (en) * 1994-06-24 1998-05-05 Samsung Electro-Mechanics Co., Ltd. Magnetoresistive element assembly with longitudinal bias
US6195232B1 (en) 1995-08-24 2001-02-27 Torohead, Inc. Low-noise toroidal thin film head with solenoidal coil
US5703740A (en) * 1995-08-24 1997-12-30 Velocidata, Inc. Toroidal thin film head
JP2000350212A (en) * 1999-06-04 2000-12-15 Matsushita Electric Ind Co Ltd Decoding device and display system for video signal
US7370403B1 (en) * 2000-06-06 2008-05-13 Taiwan Semiconductor Manufacturing Co., Ltd. Method of fabricating a planar spiral inductor structure having an enhanced Q value
US6654202B2 (en) 2000-06-20 2003-11-25 Seagate Technology Llc Disc drive with layered write coil
US6859343B1 (en) 2002-03-19 2005-02-22 Western Digital, Inc. Hybrid diffuser for minimizing thermal pole tip protrusion and reader sensor temperature
US7035046B1 (en) 2002-03-19 2006-04-25 Western Digital (Fremont), Inc. System and method for minimizing thermal pole tip protrusion
US6980395B2 (en) * 2002-10-31 2005-12-27 International Business Machines Corporation Enhanced coplanar conductance structure for inductive heads
US6950279B2 (en) * 2003-01-30 2005-09-27 Headway Technologies, Inc. Thin-film magnetic head with thin-film coil of low resistance
US7027242B1 (en) 2004-09-23 2006-04-11 Western Digital (Fremont), Inc. Method and apparatus for measuring write-induced pole tip protrusion
JP2008165923A (en) 2006-12-28 2008-07-17 Tdk Corp Thin-film magnetic head

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3564522A (en) * 1966-12-16 1971-02-16 Data Disc Inc Transducer with thin film coil and semiconductor switching
US3685144A (en) * 1967-09-18 1972-08-22 Ncr Co Method of making a magnetic transducer
DE2131096C3 (en) * 1971-06-23 1979-05-10 Transformatoren Union Ag, 7000 Stuttgart Ribbon or foil-like current conductors for windings of transformers, inductors, converters and the like
US3766640A (en) * 1971-12-20 1973-10-23 Ibm Method of manufacturing magnetic transducers
FR2209154B1 (en) * 1972-07-03 1975-04-11 Cii
JPS4950914A (en) * 1972-09-14 1974-05-17
US3829896A (en) * 1972-11-08 1974-08-13 Ibm Bias means for batch fabricated magnetic head and method of manufacture thereof
US4016519A (en) * 1976-05-14 1977-04-05 Blaupunkt-Werke Gmbh Printed circuit coils
US4130847A (en) * 1977-03-31 1978-12-19 International Business Machines Corporation Corrosion resistant thin film head assembly and method for making
DE2721452A1 (en) * 1977-05-12 1978-11-16 Siemens Ag INTEGRATED MAGNETIC HEAD STRUCTURE AND METHOD FOR MANUFACTURING IT

Also Published As

Publication number Publication date
US4219854A (en) 1980-08-26
JPS5584020A (en) 1980-06-24
ES486015A1 (en) 1980-06-16
AU5295079A (en) 1980-06-26
JPS638528B2 (en) 1988-02-23
EP0012910B1 (en) 1981-11-04
CA1126402A (en) 1982-06-22
EP0012910A1 (en) 1980-07-09
BR7908415A (en) 1980-09-23
ZA796369B (en) 1980-11-26
AU524436B2 (en) 1982-09-16

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